01574nas a2200193   4500008004100000022001400041245012400055210006900179260011000248300001400358490000700372520077000379100002201149700002001171700002101191700002001212700001801232856013001250       2012                        eng d  a1477-922600aNitrogen-rich porous covalent imine network (CIN) material as an efficient catalytic support for C-C coupling reactions0 aNitrogenrich porous covalent imine network CIN material as an ef  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcDEC  a1304-13110 v413 a<p>In an effort to expand the realm of possibilities of nitrogen-rich porous materials that could be used in catalysis, herein we report the synthesis of a new highly nitrogen rich (ca. 45%) porous covalent imine network (CIN-1) material employing simple Schiff base chemistry and further grafting its surface with palladium. Pd-loaded CIN-1 support acts as a truly heterogeneous catalyst towards Suzuki C-C coupling reaction between aryl halides with arylboronic acids. High surface area and excellent accessibility of the catalytic sites make it very efficient for heterogeneous catalysis. The stability of the catalyst due to intimate contact between nitrogen-rich organic support and metal allows several reuses with only a minor loss in catalytic activity.</p>1 aBhunia, Manas, K.1 aDas, Swapan, K.1 aPachfule, Pradip1 aBanerjee, Rahul1 aBhaumik, Asim  uhttps://library.ncl.res.in/content/nitrogen-rich-porous-covalent-imine-network-cin-material-efficient-catalytic-support-c-c-001827nas a2200241   4500008004100000022001400041245009800055210006900153260000800222300001400230490000700244520101400251653003201265653001001297653001501307653001801322653003001340100001701370700002601387700002501413700002001438856012701458       2020                        eng d  a1433-785100aNanoparticle size-fractionation through self-standing porous covalent organic framework films0 aNanoparticle sizefractionation through selfstanding porous coval  cJAN  a1161-11650 v593 a<p>Covalent organic frameworks (COFs) have attracted attention due to their ordered pores leading to important industrial applications like storage and separation. Combined with their modular synthesis and pore engineering, COFs could become ideal candidates for nanoseparations. However, the fabrication of these microcrystalline powders as continuous, crack-free, robust films remains a challenge. Herein, we report a simple, slow annealing strategy to construct centimeter-scale COF films (Tp-Azo and Tp-TTA) with micrometer thickness. The as-synthesized films are porous (SA(BET)=2033 m(2) g(-1) for Tp-Azo) and chemically stable. These COFs have distinct size cut-offs (ca. 2.7 and ca. 1.6 nm for Tp-Azo and Tp-TTA, respectively), which allow the size-selective separation of gold nanoparticles. Unlike, other conventional membranes, the durable structure of the COF films allow for excellent recyclability (up to 4 consecutive cycles) and easy recovery of the gold nanoparticles from the solution.</p>
10acovalent organic frameworks10afilms10ananofilter10aNanoparticles10asize-selective separation1 aDey, Kaushik1 aKunjattu, Shebeeb, H.1 aChahande, Anurag, M.1 aBanerjee, Rahul  uhttps://library.ncl.res.in/content/nanoparticle-size-fractionation-through-self-standing-porous-covalent-organic-framework